Navigation Conditions at Lock and Dam No. 7, Arkansas River; Hydraulic Model Investigation.

Lock and Dam No. 7 will consist of a 110- by 600-ft lock on the right bank and a 980-ft-long, nonnavigable dam of 14 gated spillway bays. A 1:120-scale, semifixed-bed model, reproducing about 7 miles of the Arkansas River, adjacent overbank areas, the lock and dam, and other structures that might affect flow conditions, was used to study navigation conditions in the lock approaches, the design of the upstream guard wall, and the location and design of any training works needed to improve navigation conditions and distribution of flow through the spillway and along the overbank. A self-propelled model towboat and tow were used to study current effects on navigation passing through the locks and through the proposed I-430 Bridge to be located about a mile upstream of the lock and dam.